Even if one has to provide the education to some of the parties as to why a particular creative solution makes a win-win-win for all. 

If anyone has done this type of project before and has a detailed/itemized breakdown of project cost (invoice), I would truly appreciate if you can provide me with a copy and any guidance.thanks!

I can see how starting with a 4-plex could provide better returns and learning opportunities without an overwhelming jump in complexity.

Spreading funds across 2-3 properties could provide diversification and steady cash flow.

If you want to know what I coach or my program, a simple Google search will provide the information.

I provide short term rental furnishing and renovation finish list that includes paint colors, light fixtures, cabinets etc.

So @Mike S. is providing the perfect solution for you. 

I was thinking if I can talk to my neighbor about sharing the cost (I, the landlord, personally provide labor and my neighbor provide material (e.g. fence pickets)).

Please note the information provided below is a layman's definition designed to provide a basic understanding for the general audience.

Where to get the most recent and accurate data for things like:Unemployment dataPopulation growthJob diversity and top employers in the areaVacancy rates (eg huduser.org)Property taxes and jnsurance costsI saw bp pro and reventure and a bunch of other websites provide some of this data, but i wonder how accurate and recent it is.